An inductive drainage structure for subway tunnel and construction method thereof

Abstract

The present invention provides an induced drainage structure for a subway tunnel and a construction method thereof, comprising: a tunnel body, a water guide and a water receiving box. The tunnel body has a deformation joint. The water guide is connected to the deformation joint, and the water guide protrudes from the back soil surface of the tunnel body. The water receiving box is connected to the tunnel body and the water receiving box covers the deformation joint and the water guide. Through the design of the drainage structure of the present application, groundwater leaking from the deformation joint drips into the water receiving box through the water guide, thereby ensuring that the groundwater will not seep through the back soil surface of the structure to both sides in the width direction of the deformation joint. The drainage structure of the present invention has low cost, convenient construction, and is convenient for large-scale application. It can ensure the dryness and good appearance of the concrete structure, and fundamentally solve the problems of water seepage, water dispersion and water seepage in the gap parts of the subway tunnel structure.

Description

Technical Field

[0001] The invention relates to the technical field of subway construction, and in particular to an inductive drainage structure for a subway tunnel and a construction method thereof. Background Art

[0002] The structural connection parts of subway tunnels mainly include the deformation joints of interval tunnels. At present, the deformation joints are generally filled with flexible fillers, and a water retaining plate is set at the bottom of the deformation joint to collect the structural leakage water and discharge it from the inside along the water retaining plate.

[0003] Due to factors such as vehicle vibration, material aging and construction quality during the operation of subway tunnels, the spatial state of the subway tunnel structure connection parts is unstable, prone to uncoordinated deformation, and may be dislocated or open. With the accumulation of groundwater, it has become a key part of structural leakage over time. At the same time, since the connection parts are only designed for water collection and drainage with limited effect, no targeted measures have been taken for seepage, dispersion and soaking, resulting in large-scale seepage, dispersion and soaking of the concrete structure surface on both sides of the back-soil retaining plate at the structural connection parts even when the amount of seepage is small. This disease is extremely common in subway tunnels during operation, resulting in a poor appearance and posing a safety hazard to the safe operation of subway tunnels. Summary of the invention

[0004] The invention discloses an inductive drainage structure for a subway tunnel and a construction method thereof.

[0005] This application provides the following solutions:

[0006] The first object of the present application is to provide an induced drainage structure for a subway tunnel, comprising:

[0007] A tunnel body, wherein the tunnel body has a deformation joint;

[0008] A water guide member, the water guide member is connected to the deformation joint and protrudes from the back soil surface of the tunnel body;

[0009] A water receiving box is connected to the tunnel body and covers the deformation joint and the water guide.

[0010] Optionally, the water guiding member is in the form of a sheet, is located on the back soil side of the tunnel body, is attached to the two side walls of the deformation joint, and is extended along the length direction of the deformation joint.

[0011] Optionally, the water guiding member is a straight sheet, and one of the water guiding members is respectively attached to the two side walls of the deformation joint, and the water guiding member extends out of the deformation joint.

[0012] Optionally, the deformation joint includes a main deformation joint and an expansion groove arranged on the side of the back soil surface of the tunnel body, and the main deformation joint is connected to the expansion groove;

[0013] The water guide is connected to the expansion groove, and the water guide part extends out of the expansion groove.

[0014] Optionally, the expanded groove includes a top groove wall and two side groove walls, the main deformation seam extends to the top groove wall, and one of the water guides is attached to each of the two side groove walls.

[0015] Optionally, the water guide member includes a first sheet and a second sheet that are perpendicular to each other, the first sheet is attached to the top groove wall, the second sheet is attached to the side groove wall, and the second sheet extends out of the flared groove.

[0016] Optionally, a water collecting portion is provided on the back-to-soil side of the tunnel body, the water collecting portion is located on both sides of the deformation joint, and the water receiving box covers the water collecting portion.

[0017] Optionally, the water collection portion includes a drip groove opened on the back soil surface of the subway tunnel, and the drip groove is extended along the length direction of the expansion groove.

[0018] Optionally, a rubber rod is further provided in a portion of the deformation joint close to the back soil surface of the tunnel body.

[0019] The second object of the present application is to provide a construction method for a subway tunnel inductive drainage structure, comprising the following steps:

[0020] S1. Remove the existing water retaining device on the back surface of the deformation joint on the tunnel body, clean the filling material in the deformation joint to a depth of 8-10 cm, use a rubber rod to caulk the joint, and reserve a certain length on the outside to form a reserved section;

[0021] S2. Making a water guide according to the shape of the end of the deformation joint back to the water surface;

[0022] S3. Use adhesive to apply to the walls on both sides of the reserved section at the bottom of the expansion joint, and paste the water guide, fix it with steel nails, and apply sealant to the steel nails;

[0023] S4. Cut a drip groove on the back soil surface of the tunnel body within 1.5~2.5 on both sides of the water guide. The depth of the drip groove is 0.5~0.8cm and the width is 0.8~1cm.

[0024] S5. Grind the concrete base surface of the back soil of the tunnel body, install the water receiving box, and fix it with anchor bolts. Seal the ends with sealant and apply waterproof coating on the outside of the water receiving box.

[0025] By adopting the above technical solution, the present invention has the following beneficial effects:

[0026] Through the design of the drainage structure of the present application, groundwater leaking from the deformation joint drips into the water receiving box through the water guide, thereby ensuring that the groundwater does not seep through the back soil surface of the structure to both sides. The drainage structure of the present invention has low cost, convenient construction, and is convenient for large-scale application. It can ensure the dryness and good appearance of the concrete structure, and fundamentally solve the problems of water seepage, water dispersion and water seepage in the gaps of the subway tunnel structure.

[0027] The specific implementation modes of the present invention are further described in detail below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings are part of this application and are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention, but do not constitute an improper limitation of the present invention. Obviously, the drawings described below are only some embodiments. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0029] Figure 1 A schematic diagram of a first prior art structure of a tunnel body of a subway tunnel provided in an embodiment of the present application;

[0030] Figure 2 A schematic diagram of an improved structure of the first prior art provided in the embodiment of the application;

[0031] Figure 3 A schematic diagram of a second prior art structure of a tunnel body of a subway tunnel provided in an embodiment of the present application;

[0032] Figure 4 A schematic diagram of an improved structure of the second prior art provided in an embodiment of the application.

[0033] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0034] 1. Tunnel body; 11. Back soil surface; 2. Expansion joint; 21. Main expansion joint; 22. Expansion groove; 3. Water guide; 4. Water collecting box; 5. Drip groove; 6. Flexible waterproof material; 7. Sealing material; 8. Rubber rod; 9. Sealant; a. Expansion bolt; b. Water retaining plate.

[0035] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but are intended to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0037] In the description of the present invention, it should be noted that the terms "upper", "lower", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0038] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] See also Figure 2 and Figure 4 As shown, an embodiment of the present application provides an inductive drainage structure for a subway tunnel, comprising: a tunnel body 1, a water guide 3 and a water receiving box 4. A deformation joint 2 is formed at the connection portion of the tunnel body 1. The water guide 3 is connected to the deformation joint 2, and the water guide 3 protrudes from the back soil surface 11 of the tunnel body 1. The water receiving box 4 is connected to the tunnel body 1, and the water receiving box 4 covers the deformation joint 2 and the water guide 3. Through the design of the drainage structure of the present application, the groundwater leaking from the deformation joint 2 drips into the water receiving box 4 through the water guide 3, thereby ensuring that the groundwater will not seep to both sides through the back soil surface of the structure. The drainage structure of the present invention is low in cost, convenient in construction, and convenient for large-scale application. It can ensure the dryness and good appearance of the concrete structure, and fundamentally solve the problems of water seepage, water dispersion and water seepage in the gap parts of the subway tunnel structure.

[0040] The water guide member can be made of stainless steel with a smooth surface. The water guide member can be in the form of a sheet. The water guide member is located on the side of the back soil surface of the tunnel body 1. The water guide member 3 is attached to the wall surfaces on both sides of the deformation joint. The water guide member 3 is extended along the length direction of the deformation joint 2. The water extending from the deformation joint 2 will drip into the water receiving box 4 along the water guide member 3.

[0041] See also Figure 1 and Figure 2As shown, when the expansion structure is not provided at the bottom of the deformation joint, only a water retaining plate b is provided at the bottom. At this time, the water guide 3 is a straight sheet, and one water guide 3 is attached to each of the two side walls of the deformation joint 2, and the water guide 3 extends out of the deformation joint 2, and the extension length can be 0.8-1 cm.

[0042] The water receiving box 4 may include a bottom wall and connecting edges arranged on both sides of the bottom wall, and the connecting edges on both sides are fixed to the soil-receiving surface 11 of the tunnel body 1 by fasteners.

[0043] In one possible embodiment, see Figure 3 and Figure 4 As shown, when the deformation joint 2 includes a main deformation joint 21 and an expansion groove 22 arranged on the side of the back soil surface 11 of the tunnel body 1, the main deformation joint 21 is connected to the expansion groove 22. The water guide 3 is connected to the expansion groove 22, and the water guide 3 partially extends out of the expansion groove 22.

[0044] In this embodiment, the seepage water can be introduced by designing the expansion groove 22 and guided to the water receiving box 4 through the water guiding member 3. The two ends of the water receiving box 4 extend to the drainage ditches on both sides of the subway tunnel respectively to discharge the water.

[0045] In a possible implementation scheme, the water guide member 3 is attached to the inner wall of the expansion groove 22, and the groundwater leaking through the deformation joint 2 drips into the water receiving box 4 through the water guide member 3, thereby ensuring that the groundwater will not seep to both sides through the back soil surface of the structure.

[0046] In a possible implementation, the expansion groove 22 includes a top groove wall and two side groove walls, the main deformation joint 21 extends to the top groove wall, and the two side groove walls are each attached with a water guide 3. The water guide 3 can cover the entire side groove wall.

[0047] In a possible implementation manner, the water guide member 3 is in a sheet shape, and the water guide member 3 may be a dripping steel sheet, and the dripping steel sheet is extended along the length direction of the expanding groove 22 .

[0048] The water guide member includes a first sheet and a second sheet connected vertically to each other, the first sheet is attached to the top groove wall, the second sheet is attached to the side groove wall, and the second sheet extends out of the flared groove and extends toward the bottom wall of the water receiving box 4. The second sheet can extend out of the flared groove by 0.8-1 cm. The water guide member can be fixed to the concrete structure by bolts, and the water guide member and the concrete are sealed with sealant to achieve the effect of sealing and water isolation.

[0049] Optionally, a water collecting part is provided on one side of the back soil surface 11 of the tunnel body 1, and the water collecting part is located on both sides of the expansion groove 22, and the water collecting part is located within the coverage of the water receiving box 4. Exemplarily, the water collecting part can be on both sides of the deformation joint and 2-3 cm away from the water guide.

[0050] The design of the water collection part aims to serve as a reserve measure to block the groundwater that seeps through the dripping steel sheet, where the groundwater gathers and drips into the water receiving box 4.

[0051] The water collection part includes a drip groove 5 provided on one side of the back soil surface 11 of the subway tunnel, and the drip groove 5 is extended along the length direction of the expansion groove 22. The depth of the drip groove 5 can be 0.5-0.8 cm, and the width of the groove can be 0.8-1 cm. Of course, the water collection part can also be a lower convex strip provided on the back soil surface 11, which can also play the role of blocking the groundwater that seeps through the drip steel sheet.

[0052] In a possible implementation, the main deformation joint 21 is filled with a flexible water-blocking material 6, which plays a certain water-blocking role while ensuring the normal operation of the deformation joint 2. The flexible water-blocking material 6 may be asphalt hemp.

[0053] Optionally, the expanded groove 22 is filled with a sealing material 7. For example, the sealing material 7 may be one or both of a water-swellable water stop strip and a polyurethane sealant. Alternatively, the sealing material 7 filled in the expanded groove 22 may be a cold-embedded asphalt-based non-curing adhesive waterproof material set on the top, a rubber strip set in the middle, and epoxy putty applied on the bottom.

[0054] A rubber rod 8 may also be provided in the deformation joint 2 near the back soil surface of the tunnel body, and a sealant is provided between the rubber rod 8 and the inner wall of the deformation joint 2 to seal and isolate water and prevent a large amount of liquid from seeping in. The rubber rod 8 may be a porous, highly elastic structure.

[0055] Embodiment 2

[0056] The second embodiment of the present application also provides a construction method of the above-mentioned subway tunnel induction drainage structure, including the following steps:

[0057] S1. Remove the existing water retaining device on the back surface of the deformation joint on the tunnel body, clean the filling material in the deformation joint to a depth of 8-10 cm, use a rubber rod to caulk the joint, and reserve a certain length on the outside to form a reserved section;

[0058] S2. Making a water guide according to the shape of the end of the deformation joint back to the water surface;

[0059] S3. Use adhesive to apply to the walls on both sides of the reserved section at the bottom of the expansion joint, and paste the water guide, fix it with steel nails, and apply sealant to the steel nails;

[0060] S4. Cut a drip groove on the back soil surface of the tunnel body within 1.5~2.5 on both sides of the water guide. The depth of the drip groove is 0.5~0.8cm and the width is 0.8~1cm.

[0061] S5. Grind the concrete base surface of the back soil surface of the tunnel body, install the water collection box, and fix it with anchor bolts. Seal the ends with sealant and apply waterproof paint on the outside of the water collection box.

[0062] Among them, in step S2, when the deformation joint is Figure 1 and Figure 2 When the deformation joint 2 has no bottom expansion structure as shown, the water guide 3 can be supported as a flat sheet. Figure 3 and Figure 4 When the bottom is provided with the structure of the expanded groove 22, a water guide 3 with an "L"-shaped cross section can be provided.

[0063] The above is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with this patent can make some changes or modify the technical contents suggested above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the solution of the present invention.

Claims

1. An inductive drainage structure for a subway tunnel, characterized in that: include: A tunnel body, wherein the tunnel body has a deformation joint; A water guide member, the water guide member is connected to the deformation joint and protrudes from the back soil surface of the tunnel body; A water receiving box, the water receiving box is connected to the tunnel body and covers the deformation joint and the water guide; The deformation joint comprises a main deformation joint and an expansion groove arranged on the back soil side of the tunnel body, the main deformation joint is connected to the expansion groove; the main deformation joint is filled with a flexible waterproof material; the flexible waterproof material is asphalt hemp; the expansion groove is filled with a sealing material; the sealing material is one or both of a water-expandable water stop strip and a polyurethane sealant; The water guide is connected to the flared groove, and the water guide part extends out of the flared groove; The expanded groove comprises a top groove wall and two side groove walls, the main deformation seam extends to the top groove wall, and a water guide is attached to each of the two side groove walls; The water guide comprises a first sheet and a second sheet perpendicular to each other, the first sheet is attached to the top groove wall, the second sheet is attached to the side groove wall, and the second sheet extends out of the flared groove; A water collecting part is arranged on one side of the back-soil surface of the tunnel body, the water collecting part is located on both sides of the deformation joint, and the water receiving box covers the water collecting part; the water collecting part includes a drip groove opened on the back-soil surface of the subway tunnel, and the drip groove is extended along the length direction of the expansion groove; a rubber rod is also arranged in the part of the deformation joint close to the back-soil surface of the tunnel body.

2. The subway tunnel inductive drainage structure according to claim 1, characterized in that: A cold-embedded asphalt-based non-curing adhesive waterproof material is arranged on the top of the sealing material, a rubber strip is arranged in the middle, and epoxy putty is coated on the bottom.

3. The construction method of the subway tunnel inductive drainage structure according to claim 1 or 2, characterized in that: The steps include: S1. Remove the existing water retaining device on the back of the deformation joint on the tunnel body, clean the filling material in the deformation joint to a depth of 8-10 cm, use a rubber rod to caulk the joint, and reserve a certain length on the outside to form a reserved section; S2. Make water guides according to the shape of the end of the soil surface behind the deformation joint; S3. Use adhesive to apply to the walls on both sides of the reserved section at the bottom of the expansion joint, and paste the water guide, fix it with steel nails, and apply sealant to the steel nails; S4. Cut a drip groove within 1.5~2.5cm on both sides of the water guide on the back soil surface of the tunnel body. The depth of the drip groove is 0.5~0.8cm and the width is 0.8~1cm. S5. Grind the concrete base surface of the back soil surface of the tunnel body, install the water collection box, and fix it with anchor bolts. Seal the ends with sealant and apply waterproof paint on the outside of the water collection box.

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